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emmainna [20.7K]
3 years ago
15

Determine whether y varies directly with x if so find the constant of variation k. 3y=-7x-18

Mathematics
2 answers:
Aleks [24]3 years ago
7 0
Sorry for the late reply, but the answer is D (yes;7/3)
Vesnalui [34]3 years ago
6 0
If y varies directly with x, then a relationship exists in the form y = kx +c
where k =  the constant of variation.

The given relationship is 
3y = 7x - 18
or
y = (7/3)x - 6
Therefore the constant of variation is 7/3.

Answer:  D. Yes; 7/3
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A savings account with $500 now has $120.​
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They spent 380.

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Which of the following inequalities matches the graph? (1 point)
Aleksandr [31]

Answer: 2x + y < 7

Step-by-step explanation:

In the graph we can see that:

The line is a dashed line, and the shaded area is below the dashed line, then we will have something like:

y < a*x + b

We also can see that the slope of the line is negative, and that the y-intercept is +7

Then the inequality will be something like:

y < a*x + 7

Now we can see that the line passes through the points (0, 7) and (3, 1)

Then the slope will be:

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that is negative, as we already said.

Then we have:

y < -2*x + 7

we can rewrite this as:

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This is the first solution shown.

7 0
2 years ago
If f(x)=(2x^2)-1, find:<br> -f(3x-1)+2
Sergeeva-Olga [200]

Answer:

-f(3x - 1) + 2 = -18x² + 12x + 1

Step-by-step explanation:

Step 1: Find f(3x - 1)

f(3x - 1) = 2(3x - 1)² - 1

f(3x - 1) = 2(9x² - 6x + 1) - 1

f(3x - 1) = 18x² - 12x + 2 - 1

f(3x - 1) = 18x² - 12x + 1

Step 2: Plug in f(3x - 1)

-(18x² - 12x + 1) + 2

Step 3: Evaluate

-18x² + 12x - 1 + 2

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8 0
3 years ago
Read 2 more answers
1. 14=7b<br> 2. -11=k/4<br> 3.6z=-6
Romashka-Z-Leto [24]

Answer:

the anwer is 14-2294-dhi2

Step-by-step explanation:

Because 14 is - 4 you multiple to 5 equal= dhi2

3 0
2 years ago
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